Steam now has support for Nintendo Online classic controllers

Steam's latest client update adds support for Nintendo Online classic controllers, including the N64 pad.

Controller:Nintendo Entertainment System Controller - PCGamingWiki PCGW - bugs, fixes, crashes, mods, guides and improvements for every PC game

Steam Added support for Nintendo Online classic controllers and Show firmware update dialog for DualSense News - PC - Valve

You can use those sweet new Nintendo 64, NES, SNES, and Sega Genesis controllers on Steam now

Nintendo's NES, SNES, Genesis, and N64 Switch gamepads work with Steam

Nintendo Switch retro controllers now compatible with Steam – Destructoid

Steam finally adds support for Nintendo Joy-Con controllers

GuliKit KingKong 2 Pro Controller, Hall Joystick Bluetooth Wireless Controller for Switch/Switch OLED/PC/Android/MacOS/IOS/Steam Deck - No Deadzone, No Drifting, APG Button, Vibration- Black : Video Games

Compatible with iPhone, iPad, macOS and Apple TV now. (Officially Supported) Compatible with Apple, Switch, PC, Android, Steam Deck & Raspberry Pi.

8BitDo Sn30 Pro Bluetooth Controller for Switch/Switch OLED, PC, macOS, Android, Steam Deck & Raspberry Pi (G Classic Edition)

Steam adds support for this Nintendo Switch controller - Times of India